Clamping device for filing documents



Oct. 12 ,1926.

' R. KOHL CLAMPING DEVICE FOR FILING DOCUMENTS Filed June 23. 1926 jiwcnzok 6 Wczimund l 754;; atlorney device and Figs. 3

" beaded edges 4 and-5 Patented Oct. 12, 1926.

UNITED STATES PATENT OFFICE. f

RAIMUND KQHL, 0F VIENNA, AUSTRIA.

CLAMPING DEVICE FOR FILING DOCUMENT S.

Application filed June 23, 1926, Serial No. 117,918, and in Austria June 20, 1925.

This invention relates to clamping-devices ior filing documents of the kind in which the documents do not require to be perforated and in which the clamp consists essentially of a pair of metal strips hinged together to form a kind of book back.

According to the present invention, a clamping-device of the kind described comprises a pair of metal strips hinged together, aspindle having opposite screw threads thereon, and a pair of nuts adjustable upon the spindle, each nut being pivotally mounted upon one of the metal strips so as to turn about an axis parallel to the hinge connecting the metal strips. The nuts are preferably provided with journal pins which are supported in tongues or tabs bent inwards out of the metal strips. The clamping of the documents is effected by drawing the two nuts together by turning the screw spindle in any known manner.

My invention provides a comparatively simple construction, with a strong and reliable clamping action, whilst enabling the T clamp to be rapidly opened or closed and permitting the provision of locking means whereby the clamp may be locked to prevent unauthorized removal of the documents.

The accompanying drawing illustrates one example of a clamping-device for filing documents according to the present invention.

Fig. 1 is an end view of the clamping-device, shown open in full lines and shown in its closed position in dotted lines. Fig. 2 is a plan view of one end of the clampingand 41 are respectively a vertical longitudinal section and edge view of the clamping device looking towards the jaws thereof. 1 V

In the construction illustrated, two similarly curved metal strips 1 and 2 are connected by a hinge 3. The free edges of the metal strips 1 and 2 are rolled over to form which are continuous from end to end ofthe metal strip and which serve to bear upon the two sides 01 the documents to be held in the clampingdevice. Near each end of the metal strips are provided tabs 6 which may be cut out oi the metal strips and bent inwardly at right angles thereto. The tabs 6 are each provided with an eye or central perforation, so that each pair of tabs at each end of the metal strip may serve as a bearing for a pair of lateral journal pins extending from an internal screw-threaded nut 7 which is thus capable of turning about an axis parallel to the axis of-the hinge 3. Each pair of nuts 7 at each end of the clamping-device is fitted upon a screw-threaded spindle 8, provided with right and left hand threads at its opposite ends, respectively, and with Y a key-receiving socket or recess 9 in one end thereof, for the reception of a suitable key. The strips 1 and 2 have openings formed by the metal displaced in stamping out the tabs 6, and it will be observed that the construction and arrangement of parts is such that the end of the spindle provided with the said key-receiving socket or recess 9 is disposed in alinement with one of these openings through which the key may be inserted to engageit with the socket 9.

The hinge 3 is preferably so constriicted as to allow the metal strips 1 and 2 to approach each other until the beaded edges 4 and 5 come in contact with one another, but to limit the separation of the metal strips 1 and 2 from each other, so as to prevent the spindle '8 from being screwed out of the nuts 7.

The clamping-device is utilized as follows In order to open the clamp, the spindle 8 is turned by means of a key inserted in the key-socket 9, so as to thrust the nuts 7 apart and thus open the jaws of the clamp until the documents can be inserted between the beaded edges 4 and 5. The documents can then be inserted so as to be positioned between the pairs of nuts 7. On reversing the rotation of the spindle 8 by means of the key, the metal strips 1 and 2 can be drawn together until a sufficient clamping pressure is obtained. On removing the key, unauthorized removal of the documents is only possible by means of a false key, but this can be obviated with sufficient security by specially designing the key socket 9. Excessive tightening ,up of the clamping-device after the beaded edges 4 and 5 come in contact with one another, is prevented by the nuts 7 bearing against the plain metal part of the spindle 8. p

In addition to the advantages already mentioned, the improved clamping-device can be produced at a very low cost, consisting as it does of only four different parts in all, including the key, and all the parts, with the exception of the key. The metal strips may be of other shape than that shown on the drawings, for example, the may be prismatic.

I claim:

A clamping device of the character described comprising a pair of metal strips having coacting clamping edges and hinged together at their opposite edges, said strips having each a pair of tabs bent inwaiidly therefrom, a spindle disposed between and at right angles to the strips and having oppositely threaded end portions and nuts engaging the threaded ends of the spindle and disposed between and )ivota-lly mounted upon the tabs o it' the strips so as to turn each about an axis parallel with the hinge connection between the strips, said strips having openings formed by the metal displaced to form the tabs and one end of the spindle being provided with a key-receiving recess accessible sthr-ough one of said openings.

In testimony whereof I have signed my name to :this specification.

RAIMUN D X011. 

